public class Student{
private String name;
private String gender;
private int age;
private double score;
private static String classRoom;
//实例代码块
{
this.name = "bit";
this.age = 12;
    this.gender = "man";
    System.out.println("I am instance init()!");
}
    // 静态代码块
    static {
        classRoom = "bit306";
        System.out.println("I am static init()!");
    }
    public Student(){
        System.out.println("I am Student init()!");
    }
    public static void main(String[] args) {
        Student s1 = new Student();
        Student s2 = new Student();
    }
}